Improvement in bail and driver for millstones



J. GRAIK. Bail and Driver for Millstones.

No. 196,336. Patented Oct. 23,1877.

ATTORNEYS.

UNITED STATES PATENT Qrrron.

JAMES OBAIK, OF LA OROSSE, WISCONSIN.

IMPROVEMENT IN BAIL AND DRIVER FOR MILLSTONES.

Specification forming part of Letters Patent No. 196,336, dated-October23, 1877; application filed July 23, 1877.

To all whom it may concern:

Be it known that I, JAMES GRAIK, of La Crosse, in the county of LaOrosse and State of Wisconsin, have invented a new and usefulImprovement in Bail and Driver for Millstones, of which the following isa specification:

Figure 1 is a side elevation of my improved bail and driver, with aportion of the bail cut away to show the construction of the drivingdevice. Fig. 2 is a central vertical section. Fig. 3 is an inverted planview of the top of the bail. Fig. 4 is a detail view of the head {)hafltis driven by the spindle and carries the Similar letters of referencesponding parts.

The object of my invention is to provide a device for drivingmillstones, which will carry the stone with a positive motion, andwhich, at the same time, will permit the stone to poise itself with theutmost freedom 011 the top of the spindle.

In the drawings, A is a mill-spindle, having formed upon its upper endtwo arc-shaped lugs, (I, having vertical sides and a central boss, I).

B is a carrier, consisting of the disk 0, thickened at its center, andprovided on opposite sides with two V-shaped ribs, d d, arranged atright angles to each other. The lower rib, d, rests on the boss I), andlugs e are formedon the lower surface of the disk, on opposite sides,each lug having a' rounded indicate correedge, f,,that rests against thevertical side of the lugs a, and isv arranged directly in line with therib d.

The inner surface of the top of the bail G is provided with lugs a and aboss, 1), similar to those upon the upper end of the spindle A. Upontherib d, which is arranged at right angles to the rib d, the boss of thebail Crests, and lugs c are formed on the upper side of the disk 0, andare provided with the rounded edges f, like those on the lugs e, whichengage the lugs a'.

L-shapedplatesgare secured to the disk 0 by screws, and are adjusted sothat the lugs a a are included between them and the rounded edges f f.

The millstone is supported by the bail O, and as it rests upon theV-shaped ribs (1 d, it is capable of universal motion, so that itreadily adjusts itself.

The rounded edges f f drive the bail. The lugs e are carried by the lugsa, on the spindle, and the lugs a in the bail are carried by the lugs eon the disk.

The rounded edges f j", being in line with the V; shaped ribs, permitthe bail to move freely on its supports, even while being driven.

When the parts become worn the L-shaped plates g are moved up againstthe lugs a c.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The disk 0,11aving V-shaped ribs d. d on oppositesides, arranged at right angles to each other, and having lugs e cwith-rounded edges ff, in combination with the spindle A and bail 0,having lugs a a, substantially as shown and described.

JAMES CRAIK. Witnesses:

JOHN WHELDON, I WOLF.

